package apiday03sdex;

import java.util.ArrayList;
import java.util.Collection;

public class CollectionDemo {
    public static void main(String[] args) {
        Collection c = new ArrayList();
        c.add(new Point(1, 2));
        c.add(new Point(3, 4));
        c.add(new Point(5, 6));
        c.add(new Point(7, 8));
        c.add(new Point(9, 0));
        c.add(new Point(1, 2));

        System.out.println(c);

        Point p = new Point(1, 2);

        boolean contains = c.contains(p);
        System.out.println("是否包含：" + contains);
        c.remove(p);
        System.out.println(c);




















































        /*Collection c = new ArrayList();*/
        /*c.add("one");*/
        /*c.add("two");*/
        /*c.add("three");*/
        /*c.add("four");*/
        /*c.add("five");*/
        /*System.out.println(c);*/

        /*       int size = c.size();*/
        /*       System.out.println("size:" + size);*/

        /* boolean isEmpty = c.isEmpty();*/
        /* System.out.println("是否为空集：" +isEmpty);*/

        /*c.clear();*/
        /*System.out.println("集合已清空");*/
        /*System.out.println(c);*/
        /*System.out.println("size:" + c.size());*/

        /*System.out.println("是否为空集：" + c.isEmpty());*/

    }
}
